Urban Renewal - Interchangeable Buildings for Your Layout
Railroad Model Craftsman 1991-10 pg. 54 Scale: Category: "Structures - Towns/Cities"
The authors describe how they change a section of the layout by changing out buildings. The idea is to show construction progress, for example, over time, mimicking the real world. The article includes a sidebar on how to make street lights and how to make dirt to fill in the gaps around removable dioramas.